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CALIBRATION OF ELECTRODES ⢠The indicator electrode is usually platinum. ⢠In practice, the SHE is not a convenient field reference electrode. ⢠More convenient reference electrodes include saturated calomel (SCE - mercury in mercurous chloride solution) or silver-silver chloride electrodes. ⢠A standard solution is employed to calibrate the electrode. ⢠Zobellâs solution - solution of potassium ferric-ferro cyanide of known Eh.
